100001720065 has 64 divisors (see below), whose sum is σ = 132007034880. Its totient is φ = 72286652160.

The previous prime is 100001720009. The next prime is 100001720087. The reversal of 100001720065 is 560027100001.

It is a de Polignac number, because none of the positive numbers 2^k-100001720065 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 288189222 + ... + 288189568.

It is an arithmetic number, because the mean of its divisors is an integer number (2062609920).

Almost surely, 2^100001720065 is an apocalyptic number.

It is an amenable number.

100001720065 is a deficient number, since it is larger than the sum of its proper divisors (32005314815).

100001720065 is a wasteful number, since it uses less digits than its factorization.

100001720065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 862.

The product of its (nonzero) digits is 420, while the sum is 22.

Adding to 100001720065 its reverse (560027100001), we get a palindrome (660028820066).

The spelling of 100001720065 in words is "one hundred billion, one million, seven hundred twenty thousand, sixty-five".